<h2>
Answer:</h2>
Hydroxide ions.
<h2>
Explanation:</h2>
- When base reacts with water they form hydroxide ion.
- For example, NH₃ + H₂O ----------> NH₄⁺ + OH⁻
(Ammonia) (Water) (Ammonium) (Hydroxide ion).
- In case of strong and week base, generally weak bases partially reacts with water to produce hydroxide ions. Whereas strong base completely reacts with water to produce hydroxide ions And the reaction between a strong acid and a strong base produces salt and water and reaction is called neutralization reaction as both acid and base get neutralized.
Result: On reaction of base with water gives hydroxide ion.
Kinetic energy=Ek
Ek=(1/2)mv²
Ek=480 J
v=8 m/s
mass=?
Ek=(1/2)mv²
480 J=(1/2)m(8 m/s)²
480 J=(32 m²/s²) m
m=(480 J)/(32 m²/s²)=15 kg
answer: the mass of the object is 15 kilograms.
Answer:
<u>Calcium chloride does not have a covalent bond , it is an ionic bond (which means donation of electrons takes place )</u>. The charge of calcium ions is +2, while the charge of sodium ions is -1. The molecule of calcium chloride contains one calcium ion (+2) and two chloride ions (-1), resulting in an overall charge of 0, or neutral.
<u>IONIC BONDING IN CALCIUM CHLORIDE</u>
Electron sharing produces covalent compounds, while electron donation produces ionic compounds. is a salt with an ionic bond. This is because calcium takes up an electron to each of the chlorine atoms, resulting in ions for calcium and ions for chlorine. At room temperature, it behaves like a normal ionic halide and is solid. Calcium is a metal with a non-metal sulphate bond.
<u>Thus , Calcium chloride have ionic bonds present on them . No covalent bonds takes place in calcium chloride.</u>
Answer:
Explanation:
The formula for efficiency is
Data:
Useful energy = 3 J
Energy input = 30 J
Calculation:
Answer:
955980 j
Explanation:
Given data:
Mass of water = 423 g
Temperature = 100°C
Amount of energy required = ?
Solution:
For one gram of water heat of energy required to convert it into vapors is 2260 j/g.
Amount of heat required for 423 g.
423 g × 2260 j/g = 955980 j
The amount of energy released when one gram steam is condensed into water is -2260 j.
For 423 g water vapor to condensed energy released.
423 g × -2260 j/g = -955980 j